2 * vim:ts=4:sw=4:expandtab
4 * i3 - an improved dynamic tiling window manager
5 * © 2009-2010 Michael Stapelberg and contributors (see also: LICENSE)
7 * con.c contains all functions which deal with containers directly (creating
8 * containers, searching containers, getting specific properties from
27 static void con_on_remove_child(Con *con);
30 * Create a new container (and attach it to the given parent, if not NULL).
31 * This function initializes the data structures and creates the appropriate
32 * X11 IDs using x_con_init().
35 Con *con_new(Con *parent, i3Window *window) {
36 Con *new = scalloc(sizeof(Con));
37 new->on_remove_child = con_on_remove_child;
38 TAILQ_INSERT_TAIL(&all_cons, new, all_cons);
41 new->border_style = config.default_border;
43 DLOG("opening window %d\n", cnt);
45 /* TODO: remove window coloring after test-phase */
46 DLOG("color %s\n", colors[cnt]);
47 new->name = strdup(colors[cnt]);
48 //uint32_t cp = get_colorpixel(colors[cnt]);
50 if ((cnt % (sizeof(colors) / sizeof(char*))) == 0)
55 TAILQ_INIT(&(new->floating_head));
56 TAILQ_INIT(&(new->nodes_head));
57 TAILQ_INIT(&(new->focus_head));
58 TAILQ_INIT(&(new->swallow_head));
61 con_attach(new, parent, false);
67 * Attaches the given container to the given parent. This happens when moving
68 * a container or when inserting a new container at a specific place in the
71 * ignore_focus is to just insert the Con at the end (useful when creating a
72 * new split container *around* some containers, that is, detaching and
73 * attaching them in order without wanting to mess with the focus in between).
76 void con_attach(Con *con, Con *parent, bool ignore_focus) {
80 struct nodes_head *nodes_head = &(parent->nodes_head);
81 struct focus_head *focus_head = &(parent->focus_head);
83 /* Workspaces are handled differently: they need to be inserted at the
85 if (con->type == CT_WORKSPACE) {
86 DLOG("it's a workspace. num = %d\n", con->num);
87 if (con->num == -1 || TAILQ_EMPTY(nodes_head)) {
88 TAILQ_INSERT_TAIL(nodes_head, con, nodes);
90 current = TAILQ_FIRST(nodes_head);
91 if (con->num < current->num) {
92 /* we need to insert the container at the beginning */
93 TAILQ_INSERT_HEAD(nodes_head, con, nodes);
95 while (current->num != -1 && con->num > current->num) {
96 current = TAILQ_NEXT(current, nodes);
97 if (current == TAILQ_END(nodes_head)) {
102 /* we need to insert con after current, if current is not NULL */
104 TAILQ_INSERT_BEFORE(current, con, nodes);
105 else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
108 goto add_to_focus_head;
111 if (con->type == CT_FLOATING_CON) {
112 DLOG("Inserting into floating containers\n");
113 TAILQ_INSERT_TAIL(&(parent->floating_head), con, floating_windows);
116 /* Get the first tiling container in focus stack */
117 TAILQ_FOREACH(loop, &(parent->focus_head), focused) {
118 if (loop->type == CT_FLOATING_CON)
125 /* When the container is not a split container (but contains a window)
126 * and is attached to a workspace, we check if the user configured a
127 * workspace_layout. This is done in workspace_attach_to, which will
128 * provide us with the container to which we should attach (either the
129 * workspace or a new split container with the configured
132 if (con->window != NULL && parent->type == CT_WORKSPACE) {
133 DLOG("Parent is a workspace. Applying default layout...\n");
134 Con *target = workspace_attach_to(parent);
136 /* Attach the original con to this new split con instead */
137 nodes_head = &(target->nodes_head);
138 focus_head = &(target->focus_head);
139 con->parent = target;
145 /* Insert the container after the tiling container, if found.
146 * When adding to a CT_OUTPUT, just append one after another. */
147 if (current && parent->type != CT_OUTPUT) {
148 DLOG("Inserting con = %p after last focused tiling con %p\n",
150 TAILQ_INSERT_AFTER(nodes_head, current, con, nodes);
151 } else TAILQ_INSERT_TAIL(nodes_head, con, nodes);
155 /* We insert to the TAIL because con_focus() will correct this.
156 * This way, we have the option to insert Cons without having
158 TAILQ_INSERT_TAIL(focus_head, con, focused);
162 * Detaches the given container from its current parent
165 void con_detach(Con *con) {
166 if (con->type == CT_FLOATING_CON) {
167 TAILQ_REMOVE(&(con->parent->floating_head), con, floating_windows);
168 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
170 TAILQ_REMOVE(&(con->parent->nodes_head), con, nodes);
171 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
176 * Sets input focus to the given container. Will be updated in X11 in the next
177 * run of x_push_changes().
180 void con_focus(Con *con) {
182 DLOG("con_focus = %p\n", con);
184 /* 1: set focused-pointer to the new con */
185 /* 2: exchange the position of the container in focus stack of the parent all the way up */
186 TAILQ_REMOVE(&(con->parent->focus_head), con, focused);
187 TAILQ_INSERT_HEAD(&(con->parent->focus_head), con, focused);
188 if (con->parent->parent != NULL)
189 con_focus(con->parent);
194 workspace_update_urgent_flag(con_get_workspace(con));
196 DLOG("con_focus done = %p\n", con);
200 * Returns true when this node is a leaf node (has no children)
203 bool con_is_leaf(Con *con) {
204 return TAILQ_EMPTY(&(con->nodes_head));
208 * Returns true if this node accepts a window (if the node swallows windows,
209 * it might already have swallowed enough and cannot hold any more).
212 bool con_accepts_window(Con *con) {
213 /* 1: workspaces never accept direct windows */
214 if (con->type == CT_WORKSPACE)
217 if (con->orientation != NO_ORIENTATION) {
218 DLOG("container %p does not accepts windows, orientation != NO_ORIENTATION\n", con);
222 /* TODO: if this is a swallowing container, we need to check its max_clients */
223 return (con->window == NULL);
227 * Gets the output container (first container with CT_OUTPUT in hierarchy) this
231 Con *con_get_output(Con *con) {
233 while (result != NULL && result->type != CT_OUTPUT)
234 result = result->parent;
235 /* We must be able to get an output because focus can never be set higher
236 * in the tree (root node cannot be focused). */
237 assert(result != NULL);
242 * Gets the workspace container this node is on.
245 Con *con_get_workspace(Con *con) {
247 while (result != NULL && result->type != CT_WORKSPACE)
248 result = result->parent;
253 * Searches parenst of the given 'con' until it reaches one with the specified
254 * 'orientation'. Aborts when it comes across a floating_con.
257 Con *con_parent_with_orientation(Con *con, orientation_t orientation) {
258 DLOG("Searching for parent of Con %p with orientation %d\n", con, orientation);
259 Con *parent = con->parent;
260 if (parent->type == CT_FLOATING_CON)
262 while (con_orientation(parent) != orientation) {
263 DLOG("Need to go one level further up\n");
264 parent = parent->parent;
265 /* Abort when we reach a floating con */
266 if (parent && parent->type == CT_FLOATING_CON)
271 DLOG("Result: %p\n", parent);
276 * helper data structure for the breadth-first-search in
277 * con_get_fullscreen_con()
283 TAILQ_ENTRY(bfs_entry) entries;
287 * Returns the first fullscreen node below this node.
290 Con *con_get_fullscreen_con(Con *con, int fullscreen_mode) {
291 Con *current, *child;
293 /* TODO: is breadth-first-search really appropriate? (check as soon as
294 * fullscreen levels and fullscreen for containers is implemented) */
295 TAILQ_HEAD(bfs_head, bfs_entry) bfs_head = TAILQ_HEAD_INITIALIZER(bfs_head);
296 struct bfs_entry *entry = smalloc(sizeof(struct bfs_entry));
298 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
300 while (!TAILQ_EMPTY(&bfs_head)) {
301 entry = TAILQ_FIRST(&bfs_head);
302 current = entry->con;
303 if (current != con && current->fullscreen_mode == fullscreen_mode) {
304 /* empty the queue */
305 while (!TAILQ_EMPTY(&bfs_head)) {
306 entry = TAILQ_FIRST(&bfs_head);
307 TAILQ_REMOVE(&bfs_head, entry, entries);
313 TAILQ_REMOVE(&bfs_head, entry, entries);
316 TAILQ_FOREACH(child, &(current->nodes_head), nodes) {
317 entry = smalloc(sizeof(struct bfs_entry));
319 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
322 TAILQ_FOREACH(child, &(current->floating_head), floating_windows) {
323 entry = smalloc(sizeof(struct bfs_entry));
325 TAILQ_INSERT_TAIL(&bfs_head, entry, entries);
333 * Returns true if the node is floating.
336 bool con_is_floating(Con *con) {
338 DLOG("checking if con %p is floating\n", con);
339 return (con->floating >= FLOATING_AUTO_ON);
343 * Checks if the given container is either floating or inside some floating
344 * container. It returns the FLOATING_CON container.
347 Con *con_inside_floating(Con *con) {
349 if (con->type == CT_FLOATING_CON)
352 if (con->floating >= FLOATING_AUTO_ON)
355 if (con->type == CT_WORKSPACE || con->type == CT_OUTPUT)
358 return con_inside_floating(con->parent);
362 * Returns the container with the given client window ID or NULL if no such
366 Con *con_by_window_id(xcb_window_t window) {
368 TAILQ_FOREACH(con, &all_cons, all_cons)
369 if (con->window != NULL && con->window->id == window)
375 * Returns the container with the given frame ID or NULL if no such container
379 Con *con_by_frame_id(xcb_window_t frame) {
381 TAILQ_FOREACH(con, &all_cons, all_cons)
382 if (con->frame == frame)
388 * Returns the first container below 'con' which wants to swallow this window
392 Con *con_for_window(Con *con, i3Window *window, Match **store_match) {
395 DLOG("searching con for window %p starting at con %p\n", window, con);
396 DLOG("class == %s\n", window->class_class);
398 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
399 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
400 if (!match_matches_window(match, window))
402 if (store_match != NULL)
403 *store_match = match;
406 Con *result = con_for_window(child, window, store_match);
411 TAILQ_FOREACH(child, &(con->floating_head), floating_windows) {
412 TAILQ_FOREACH(match, &(child->swallow_head), matches) {
413 if (!match_matches_window(match, window))
415 if (store_match != NULL)
416 *store_match = match;
419 Con *result = con_for_window(child, window, store_match);
428 * Returns the number of children of this container.
431 int con_num_children(Con *con) {
435 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
442 * Updates the percent attribute of the children of the given container. This
443 * function needs to be called when a window is added or removed from a
447 void con_fix_percent(Con *con) {
449 int children = con_num_children(con);
451 // calculate how much we have distributed and how many containers
452 // with a percentage set we have
454 int children_with_percent = 0;
455 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
456 if (child->percent > 0.0) {
457 total += child->percent;
458 ++children_with_percent;
462 // if there were children without a percentage set, set to a value that
463 // will make those children proportional to all others
464 if (children_with_percent != children) {
465 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
466 if (child->percent <= 0.0) {
467 if (children_with_percent == 0)
468 total += (child->percent = 1.0);
469 else total += (child->percent = total / children_with_percent);
474 // if we got a zero, just distribute the space equally, otherwise
475 // distribute according to the proportions we got
477 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
478 child->percent = 1.0 / children;
479 } else if (total != 1.0) {
480 TAILQ_FOREACH(child, &(con->nodes_head), nodes)
481 child->percent /= total;
486 * Toggles fullscreen mode for the given container. Fullscreen mode will not be
487 * entered when there already is a fullscreen container on this workspace.
490 void con_toggle_fullscreen(Con *con, int fullscreen_mode) {
491 Con *workspace, *fullscreen;
493 if (con->type == CT_WORKSPACE) {
494 DLOG("You cannot make a workspace fullscreen.\n");
498 DLOG("toggling fullscreen for %p / %s\n", con, con->name);
499 if (con->fullscreen_mode == CF_NONE) {
500 /* 1: check if there already is a fullscreen con */
501 if (fullscreen_mode == CF_GLOBAL)
502 fullscreen = con_get_fullscreen_con(croot, CF_GLOBAL);
504 workspace = con_get_workspace(con);
505 fullscreen = con_get_fullscreen_con(workspace, CF_OUTPUT);
507 if (fullscreen != NULL) {
508 LOG("Not entering fullscreen mode, container (%p/%s) "
509 "already is in fullscreen mode\n",
510 fullscreen, fullscreen->name);
511 goto update_netwm_state;
514 /* 2: enable fullscreen */
515 con->fullscreen_mode = fullscreen_mode;
517 /* 1: disable fullscreen */
518 con->fullscreen_mode = CF_NONE;
522 DLOG("mode now: %d\n", con->fullscreen_mode);
524 /* update _NET_WM_STATE if this container has a window */
525 /* TODO: when a window is assigned to a container which is already
526 * fullscreened, this state needs to be pushed to the client, too */
527 if (con->window == NULL)
531 unsigned int num = 0;
533 if (con->fullscreen_mode != CF_NONE)
534 values[num++] = A__NET_WM_STATE_FULLSCREEN;
536 xcb_change_property(conn, XCB_PROP_MODE_REPLACE, con->window->id,
537 A__NET_WM_STATE, A_ATOM, 32, num, values);
541 * Moves the given container to the currently focused container on the given
543 * TODO: is there a better place for this function?
546 void con_move_to_workspace(Con *con, Con *workspace) {
547 if (con->type == CT_WORKSPACE) {
548 DLOG("Moving workspaces is not yet implemented.\n");
552 if (con_is_floating(con)) {
553 DLOG("Using FLOATINGCON instead\n");
557 Con *source_output = con_get_output(con),
558 *dest_output = con_get_output(workspace);
560 /* 1: save the container which is going to be focused after the current
561 * container is moved away */
562 Con *focus_next = con_next_focused(con);
564 /* 2: get the focused container of this workspace */
565 Con *next = con_descend_focused(workspace);
567 /* 3: we go up one level, but only when next is a normal container */
568 if (next->type != CT_WORKSPACE) {
569 DLOG("next originally = %p / %s / type %d\n", next, next->name, next->type);
573 /* 4: if the target container is floating, we get the workspace instead.
574 * Only tiling windows need to get inserted next to the current container.
576 Con *floatingcon = con_inside_floating(next);
577 if (floatingcon != NULL) {
578 DLOG("floatingcon, going up even further\n");
579 next = floatingcon->parent;
582 if (con->type == CT_FLOATING_CON) {
583 Con *ws = con_get_workspace(next);
584 DLOG("This is a floating window, using workspace %p / %s\n", ws, ws->name);
588 DLOG("Re-attaching container to %p / %s\n", next, next->name);
589 /* 5: re-attach the con to the parent of this focused container */
590 Con *parent = con->parent;
592 con_attach(con, next, false);
594 /* 6: fix the percentages */
595 con_fix_percent(parent);
597 con_fix_percent(next);
599 /* 7: focus the con on the target workspace (the X focus is only updated by
600 * calling tree_render(), so for the "real" focus this is a no-op) */
603 /* 8: when moving to a visible workspace on a different output, we keep the
604 * con focused. Otherwise, we leave the focus on the current workspace as we
605 * don’t want to focus invisible workspaces */
606 if (source_output != dest_output &&
607 workspace_is_visible(workspace)) {
608 DLOG("Moved to a different output, focusing target\n");
610 con_focus(focus_next);
613 CALL(parent, on_remove_child);
617 * Returns the orientation of the given container (for stacked containers,
618 * vertical orientation is used regardless of the actual orientation of the
622 int con_orientation(Con *con) {
623 /* stacking containers behave like they are in vertical orientation */
624 if (con->layout == L_STACKED)
627 if (con->layout == L_TABBED)
630 return con->orientation;
634 * Returns the container which will be focused next when the given container
635 * is not available anymore. Called in tree_close and con_move_to_workspace
636 * to properly restore focus.
639 Con *con_next_focused(Con *con) {
641 /* floating containers are attached to a workspace, so we focus either the
642 * next floating container (if any) or the workspace itself. */
643 if (con->type == CT_FLOATING_CON) {
644 DLOG("selecting next for CT_FLOATING_CON\n");
645 next = TAILQ_NEXT(con, floating_windows);
646 DLOG("next = %p\n", next);
648 next = TAILQ_PREV(con, floating_head, floating_windows);
649 DLOG("using prev, next = %p\n", next);
652 Con *ws = con_get_workspace(con);
654 DLOG("no more floating containers for next = %p, restoring workspace focus\n", next);
655 while (next != TAILQ_END(&(ws->focus_head)) && !TAILQ_EMPTY(&(next->focus_head))) {
656 next = TAILQ_FIRST(&(next->focus_head));
658 DLOG("skipping container itself, we want the next client\n");
659 next = TAILQ_NEXT(next, focused);
662 if (next == TAILQ_END(&(ws->focus_head))) {
663 DLOG("Focus list empty, returning ws\n");
667 /* Instead of returning the next CT_FLOATING_CON, we descend it to
668 * get an actual window to focus. */
669 next = con_descend_focused(next);
674 /* dock clients cannot be focused, so we focus the workspace instead */
675 if (con->parent->type == CT_DOCKAREA) {
676 DLOG("selecting workspace for dock client\n");
677 return con_descend_focused(output_get_content(con->parent->parent));
680 /* if 'con' is not the first entry in the focus stack, use the first one as
681 * it’s currently focused already */
682 Con *first = TAILQ_FIRST(&(con->parent->focus_head));
684 DLOG("Using first entry %p\n", first);
687 /* try to focus the next container on the same level as this one or fall
688 * back to its parent */
689 if (!(next = TAILQ_NEXT(con, focused)))
693 /* now go down the focus stack as far as
694 * possible, excluding the current container */
695 while (!TAILQ_EMPTY(&(next->focus_head)) &&
696 TAILQ_FIRST(&(next->focus_head)) != con)
697 next = TAILQ_FIRST(&(next->focus_head));
703 * Get the next/previous container in the specified orientation. This may
704 * travel up until it finds a container with suitable orientation.
707 Con *con_get_next(Con *con, char way, orientation_t orientation) {
708 DLOG("con_get_next(way=%c, orientation=%d)\n", way, orientation);
709 /* 1: get the first parent with the same orientation */
711 while (con_orientation(cur->parent) != orientation) {
712 DLOG("need to go one level further up\n");
713 if (cur->parent->type == CT_WORKSPACE) {
714 LOG("that's a workspace, we can't go further up\n");
720 /* 2: chose next (or previous) */
723 next = TAILQ_NEXT(cur, nodes);
724 /* if we are at the end of the list, we need to wrap */
725 if (next == TAILQ_END(&(parent->nodes_head)))
728 next = TAILQ_PREV(cur, nodes_head, nodes);
729 /* if we are at the end of the list, we need to wrap */
730 if (next == TAILQ_END(&(cur->nodes_head)))
733 DLOG("next = %p\n", next);
739 * Returns the focused con inside this client, descending the tree as far as
740 * possible. This comes in handy when attaching a con to a workspace at the
741 * currently focused position, for example.
744 Con *con_descend_focused(Con *con) {
746 while (!TAILQ_EMPTY(&(next->focus_head)))
747 next = TAILQ_FIRST(&(next->focus_head));
752 * Returns the focused con inside this client, descending the tree as far as
753 * possible. This comes in handy when attaching a con to a workspace at the
754 * currently focused position, for example.
756 * Works like con_descend_focused but considers only tiling cons.
759 Con *con_descend_tiling_focused(Con *con) {
765 TAILQ_FOREACH(child, &(next->focus_head), focused) {
766 if (child->type == CT_FLOATING_CON)
772 } while (before != next);
777 * Returns the leftmost, rightmost, etc. container in sub-tree. For example, if
778 * direction is D_LEFT, then we return the rightmost container and if direction
779 * is D_RIGHT, we return the leftmost container. This is because if we are
780 * moving D_LEFT, and thus want the rightmost container.
783 Con *con_descend_direction(Con *con, direction_t direction) {
785 DLOG("con_descend_direction(%p, %d)\n", con, direction);
786 if (direction == D_LEFT || direction == D_RIGHT) {
787 if (con->orientation == HORIZ) {
788 /* If the direction is horizontal, we can use either the first
789 * (D_RIGHT) or the last con (D_LEFT) */
790 if (direction == D_RIGHT)
791 most = TAILQ_FIRST(&(con->nodes_head));
792 else most = TAILQ_LAST(&(con->nodes_head), nodes_head);
793 } else if (con->orientation == VERT) {
794 /* Wrong orientation. We use the last focused con. Within that con,
795 * we recurse to chose the left/right con or at least the last
797 most = TAILQ_FIRST(&(con->focus_head));
799 /* If the con has no orientation set, it’s not a split container
800 * but a container with a client window, so stop recursing */
805 if (direction == D_UP || direction == D_DOWN) {
806 if (con->orientation == VERT) {
807 /* If the direction is vertical, we can use either the first
808 * (D_DOWN) or the last con (D_UP) */
809 if (direction == D_UP)
810 most = TAILQ_LAST(&(con->nodes_head), nodes_head);
811 else most = TAILQ_FIRST(&(con->nodes_head));
812 } else if (con->orientation == HORIZ) {
813 /* Wrong orientation. We use the last focused con. Within that con,
814 * we recurse to chose the top/bottom con or at least the last
816 most = TAILQ_FIRST(&(con->focus_head));
818 /* If the con has no orientation set, it’s not a split container
819 * but a container with a client window, so stop recursing */
826 return con_descend_direction(most, direction);
830 * Returns a "relative" Rect which contains the amount of pixels that need to
831 * be added to the original Rect to get the final position (obviously the
832 * amount of pixels for normal, 1pixel and borderless are different).
835 Rect con_border_style_rect(Con *con) {
836 switch (con_border_style(con)) {
838 return (Rect){2, 0, -(2 * 2), -2};
841 return (Rect){1, 1, -2, -2};
844 return (Rect){0, 0, 0, 0};
852 * Use this function to get a container’s border style. This is important
853 * because when inside a stack, the border style is always BS_NORMAL.
854 * For tabbed mode, the same applies, with one exception: when the container is
855 * borderless and the only element in the tabbed container, the border is not
858 * For children of a CT_DOCKAREA, the border style is always none.
861 int con_border_style(Con *con) {
862 Con *fs = con_get_fullscreen_con(con->parent, CF_OUTPUT);
864 DLOG("this one is fullscreen! overriding BS_NONE\n");
868 if (con->parent->layout == L_STACKED)
869 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
871 if (con->parent->layout == L_TABBED && con->border_style != BS_NORMAL)
872 return (con_num_children(con->parent) == 1 ? con->border_style : BS_NORMAL);
874 if (con->parent->type == CT_DOCKAREA)
877 return con->border_style;
881 * This function changes the layout of a given container. Use it to handle
882 * special cases like changing a whole workspace to stacked/tabbed (creates a
883 * new split container before).
886 void con_set_layout(Con *con, int layout) {
887 /* When the container type is CT_WORKSPACE, the user wants to change the
888 * whole workspace into stacked/tabbed mode. To do this and still allow
889 * intuitive operations (like level-up and then opening a new window), we
890 * need to create a new split container. */
891 if (con->type == CT_WORKSPACE) {
892 DLOG("Creating new split container\n");
893 /* 1: create a new split container */
894 Con *new = con_new(NULL, NULL);
897 /* 2: set the requested layout on the split con */
898 new->layout = layout;
900 /* 3: While the layout is irrelevant in stacked/tabbed mode, it needs
901 * to be set. Otherwise, this con will not be interpreted as a split
903 if (config.default_orientation == NO_ORIENTATION) {
904 new->orientation = (con->rect.height > con->rect.width) ? VERT : HORIZ;
906 new->orientation = config.default_orientation;
909 Con *old_focused = TAILQ_FIRST(&(con->focus_head));
910 if (old_focused == TAILQ_END(&(con->focus_head)))
913 /* 4: move the existing cons of this workspace below the new con */
914 DLOG("Moving cons\n");
916 while (!TAILQ_EMPTY(&(con->nodes_head))) {
917 child = TAILQ_FIRST(&(con->nodes_head));
919 con_attach(child, new, true);
922 /* 4: attach the new split container to the workspace */
923 DLOG("Attaching new split to ws\n");
924 con_attach(new, con, false);
927 con_focus(old_focused);
934 con->layout = layout;
938 * Callback which will be called when removing a child from the given con.
939 * Kills the container if it is empty and replaces it with the child if there
940 * is exactly one child.
943 static void con_on_remove_child(Con *con) {
944 DLOG("on_remove_child\n");
946 /* Every container 'above' (in the hierarchy) the workspace content should
947 * not be closed when the last child was removed */
948 if (con->type == CT_WORKSPACE ||
949 con->type == CT_OUTPUT ||
950 con->type == CT_ROOT ||
951 con->type == CT_DOCKAREA) {
952 DLOG("not handling, type = %d\n", con->type);
956 /* TODO: check if this container would swallow any other client and
957 * don’t close it automatically. */
958 int children = con_num_children(con);
960 DLOG("Container empty, closing\n");
961 tree_close(con, DONT_KILL_WINDOW, false);
967 * Determines the minimum size of the given con by looking at its children (for
968 * split/stacked/tabbed cons). Will be called when resizing floating cons
971 Rect con_minimum_size(Con *con) {
972 DLOG("Determining minimum size for con %p\n", con);
974 if (con_is_leaf(con)) {
975 DLOG("leaf node, returning 75x50\n");
976 return (Rect){ 0, 0, 75, 50 };
979 if (con->type == CT_FLOATING_CON) {
980 DLOG("floating con\n");
981 Con *child = TAILQ_FIRST(&(con->nodes_head));
982 return con_minimum_size(child);
985 if (con->layout == L_STACKED || con->layout == L_TABBED) {
986 uint32_t max_width = 0, max_height = 0, deco_height = 0;
988 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
989 Rect min = con_minimum_size(child);
990 deco_height += child->deco_rect.height;
991 max_width = max(max_width, min.width);
992 max_height = max(max_height, min.height);
994 DLOG("stacked/tabbed now, returning %d x %d + deco_rect = %d\n",
995 max_width, max_height, deco_height);
996 return (Rect){ 0, 0, max_width, max_height + deco_height };
999 /* For horizontal/vertical split containers we sum up the width (h-split)
1000 * or height (v-split) and use the maximum of the height (h-split) or width
1001 * (v-split) as minimum size. */
1002 if (con->orientation == HORIZ || con->orientation == VERT) {
1003 uint32_t width = 0, height = 0;
1005 TAILQ_FOREACH(child, &(con->nodes_head), nodes) {
1006 Rect min = con_minimum_size(child);
1007 if (con->orientation == HORIZ) {
1009 height = max(height, min.height);
1011 height += min.height;
1012 width = max(width, min.width);
1015 DLOG("split container, returning width = %d x height = %d\n", width, height);
1016 return (Rect){ 0, 0, width, height };
1019 ELOG("Unhandled case, type = %d, layout = %d, orientation = %d\n",
1020 con->type, con->layout, con->orientation);